package com.xiaotu.facade;

/**
 * @author 张晓
 * @create 2020-06-23 14:45
 */
public class Projector {
    private static Projector instance = new Projector();
    public static Projector getInstance(){
        return instance;
    }

    public void on(){
        System.out.println(" projector on ");
    }

    public void off(){
        System.out.println(" projector off ");
    }
    public void focus(){
        System.out.println(" project is focus ");
    }
}
